354 lines
12 KiB
Python
354 lines
12 KiB
Python
# Copyright 2011 Justin Santa Barbara
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# All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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"""The volumes api."""
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import webob
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from webob import exc
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from xml.dom import minidom
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from cinder.api import common
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from cinder.api.openstack import wsgi
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from cinder.api.v2.views import volumes as volume_views
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from cinder.api import xmlutil
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from cinder import exception
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from cinder import flags
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from cinder.openstack.common import log as logging
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from cinder.openstack.common import uuidutils
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from cinder import volume
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from cinder.volume import volume_types
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LOG = logging.getLogger(__name__)
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FLAGS = flags.FLAGS
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def make_attachment(elem):
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elem.set('id')
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elem.set('server_id')
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elem.set('volume_id')
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elem.set('device')
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def make_volume(elem):
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elem.set('id')
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elem.set('status')
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elem.set('size')
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elem.set('availability_zone')
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elem.set('created_at')
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elem.set('name')
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elem.set('display_description')
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elem.set('volume_type')
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elem.set('snapshot_id')
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elem.set('source_volid')
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attachments = xmlutil.SubTemplateElement(elem, 'attachments')
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attachment = xmlutil.SubTemplateElement(attachments, 'attachment',
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selector='attachments')
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make_attachment(attachment)
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# Attach metadata node
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elem.append(common.MetadataTemplate())
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volume_nsmap = {None: xmlutil.XMLNS_VOLUME_V2, 'atom': xmlutil.XMLNS_ATOM}
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class VolumeTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('volume', selector='volume')
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make_volume(root)
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return xmlutil.MasterTemplate(root, 1, nsmap=volume_nsmap)
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class VolumesTemplate(xmlutil.TemplateBuilder):
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def construct(self):
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root = xmlutil.TemplateElement('volumes')
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elem = xmlutil.SubTemplateElement(root, 'volume', selector='volumes')
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make_volume(elem)
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return xmlutil.MasterTemplate(root, 1, nsmap=volume_nsmap)
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class CommonDeserializer(wsgi.MetadataXMLDeserializer):
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"""Common deserializer to handle xml-formatted volume requests.
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Handles standard volume attributes as well as the optional metadata
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attribute
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"""
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metadata_deserializer = common.MetadataXMLDeserializer()
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def _extract_volume(self, node):
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"""Marshal the volume attribute of a parsed request."""
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volume = {}
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volume_node = self.find_first_child_named(node, 'volume')
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attributes = ['name', 'display_description', 'size',
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'volume_type', 'availability_zone']
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for attr in attributes:
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if volume_node.getAttribute(attr):
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volume[attr] = volume_node.getAttribute(attr)
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metadata_node = self.find_first_child_named(volume_node, 'metadata')
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if metadata_node is not None:
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volume['metadata'] = self.extract_metadata(metadata_node)
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return volume
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class CreateDeserializer(CommonDeserializer):
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"""Deserializer to handle xml-formatted create volume requests.
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Handles standard volume attributes as well as the optional metadata
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attribute
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"""
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def default(self, string):
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"""Deserialize an xml-formatted volume create request."""
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dom = minidom.parseString(string)
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volume = self._extract_volume(dom)
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return {'body': {'volume': volume}}
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class VolumeController(wsgi.Controller):
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"""The Volumes API controller for the OpenStack API."""
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_view_builder_class = volume_views.ViewBuilder
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def __init__(self, ext_mgr):
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self.volume_api = volume.API()
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self.ext_mgr = ext_mgr
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super(VolumeController, self).__init__()
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@wsgi.serializers(xml=VolumeTemplate)
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def show(self, req, id):
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"""Return data about the given volume."""
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context = req.environ['cinder.context']
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try:
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vol = self.volume_api.get(context, id)
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except exception.NotFound:
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raise exc.HTTPNotFound()
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return self._view_builder.detail(req, vol)
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def delete(self, req, id):
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"""Delete a volume."""
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context = req.environ['cinder.context']
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LOG.audit(_("Delete volume with id: %s"), id, context=context)
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try:
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volume = self.volume_api.get(context, id)
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self.volume_api.delete(context, volume)
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except exception.NotFound:
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raise exc.HTTPNotFound()
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return webob.Response(status_int=202)
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@wsgi.serializers(xml=VolumesTemplate)
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def index(self, req):
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"""Returns a summary list of volumes."""
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return self._get_volumes(req, is_detail=False)
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@wsgi.serializers(xml=VolumesTemplate)
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def detail(self, req):
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"""Returns a detailed list of volumes."""
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return self._get_volumes(req, is_detail=True)
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def _get_volumes(self, req, is_detail):
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"""Returns a list of volumes, transformed through view builder."""
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context = req.environ['cinder.context']
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params = req.params.copy()
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marker = params.pop('marker', None)
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limit = params.pop('limit', None)
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sort_key = params.pop('sort_key', 'created_at')
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sort_dir = params.pop('sort_dir', 'desc')
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filters = params
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remove_invalid_options(context,
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filters, self._get_volume_filter_options())
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# NOTE(thingee): v2 API allows name instead of display_name
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if 'name' in filters:
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filters['display_name'] = filters['name']
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del filters['name']
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volumes = self.volume_api.get_all(context, marker, limit, sort_key,
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sort_dir, filters)
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limited_list = common.limited(volumes, req)
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if is_detail:
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volumes = self._view_builder.detail_list(req, limited_list)
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else:
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volumes = self._view_builder.summary_list(req, limited_list)
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return volumes
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def _image_uuid_from_href(self, image_href):
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# If the image href was generated by nova api, strip image_href
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# down to an id.
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try:
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image_uuid = image_href.split('/').pop()
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except (TypeError, AttributeError):
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msg = _("Invalid imageRef provided.")
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raise exc.HTTPBadRequest(explanation=msg)
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if not uuidutils.is_uuid_like(image_uuid):
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msg = _("Invalid imageRef provided.")
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raise exc.HTTPBadRequest(explanation=msg)
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return image_uuid
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@wsgi.serializers(xml=VolumeTemplate)
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@wsgi.deserializers(xml=CreateDeserializer)
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def create(self, req, body):
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"""Creates a new volume."""
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if not self.is_valid_body(body, 'volume'):
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raise exc.HTTPUnprocessableEntity()
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context = req.environ['cinder.context']
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volume = body['volume']
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kwargs = {}
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# NOTE(thingee): v2 API allows name instead of display_name
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if volume.get('name'):
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volume['display_name'] = volume.get('name')
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del volume['name']
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req_volume_type = volume.get('volume_type', None)
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if req_volume_type:
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try:
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kwargs['volume_type'] = volume_types.get_volume_type_by_name(
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context, req_volume_type)
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except exception.VolumeTypeNotFound:
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explanation = 'Volume type not found.'
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raise exc.HTTPNotFound(explanation=explanation)
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kwargs['metadata'] = volume.get('metadata', None)
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snapshot_id = volume.get('snapshot_id')
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if snapshot_id is not None:
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kwargs['snapshot'] = self.volume_api.get_snapshot(context,
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snapshot_id)
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else:
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kwargs['snapshot'] = None
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source_volid = volume.get('source_volid')
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if source_volid is not None:
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kwargs['source_volume'] = self.volume_api.get_volume(context,
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source_volid)
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else:
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kwargs['source_volume'] = None
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size = volume.get('size', None)
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if size is None and kwargs['snapshot'] is not None:
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size = kwargs['snapshot']['volume_size']
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elif size is None and kwargs['source_volume'] is not None:
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size = kwargs['source_volume']['size']
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LOG.audit(_("Create volume of %s GB"), size, context=context)
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image_href = None
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image_uuid = None
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if self.ext_mgr.is_loaded('os-image-create'):
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image_href = volume.get('imageRef')
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if snapshot_id and image_href:
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msg = _("Snapshot and image cannot be specified together.")
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raise exc.HTTPBadRequest(explanation=msg)
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if image_href:
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image_uuid = self._image_uuid_from_href(image_href)
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kwargs['image_id'] = image_uuid
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kwargs['availability_zone'] = volume.get('availability_zone', None)
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new_volume = self.volume_api.create(context,
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size,
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volume.get('display_name'),
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volume.get('display_description'),
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**kwargs)
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# TODO(vish): Instance should be None at db layer instead of
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# trying to lazy load, but for now we turn it into
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# a dict to avoid an error.
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retval = self._view_builder.summary(req, dict(new_volume.iteritems()))
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return retval
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def _get_volume_filter_options(self):
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"""Return volume search options allowed by non-admin."""
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return ('name', 'status')
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@wsgi.serializers(xml=VolumeTemplate)
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def update(self, req, id, body):
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"""Update a volume."""
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context = req.environ['cinder.context']
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if not body:
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raise exc.HTTPUnprocessableEntity()
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if 'volume' not in body:
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raise exc.HTTPUnprocessableEntity()
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volume = body['volume']
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update_dict = {}
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valid_update_keys = (
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'name',
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'display_description',
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'metadata',
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)
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for key in valid_update_keys:
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if key in volume:
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update_dict[key] = volume[key]
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# NOTE(thingee): v2 API allows name instead of display_name
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if 'name' in update_dict:
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update_dict['display_name'] = update_dict['name']
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del update_dict['name']
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try:
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volume = self.volume_api.get(context, id)
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self.volume_api.update(context, volume, update_dict)
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except exception.NotFound:
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raise exc.HTTPNotFound()
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volume.update(update_dict)
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return self._view_builder.detail(req, volume)
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def create_resource(ext_mgr):
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return wsgi.Resource(VolumeController(ext_mgr))
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def remove_invalid_options(context, filters, allowed_search_options):
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"""Remove search options that are not valid for non-admin API/context."""
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if context.is_admin:
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# Allow all options
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return
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# Otherwise, strip out all unknown options
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unknown_options = [opt for opt in filters
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if opt not in allowed_search_options]
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bad_options = ", ".join(unknown_options)
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log_msg = _("Removing options '%s' from query") % bad_options
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LOG.debug(log_msg)
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for opt in unknown_options:
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del filters[opt]
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